2012. https://www.theregister.com/2012/05/09/atlassian_cloud_stora...

"An Atlassian spokesperson contacted by The Reg blamed the loss on the failure of “multiple” storage disks at its cloud storage provider on 28 April."

10 years ago to the month.

So as long as everyone plans a vacation for this time in 2032 it'll be OK.

Ah, you mean that outages have happened in the past, not that Atlassian has changed because of an outage.